Improvement in automatic stop-cock for g-as-buhners



G. E. SMITH.

GasiBurner--Stop-Cock.

Patented Dec. 15, 1868.

i ni

v j@ 4 ,tima game (hihihi GEORGE E. SMITH,V OFSAN FRANCISCO, CALIFORNIA,

Letters Patent No. 84,914, dcted December 15, 1868.

IMPROVEMENT IN AUTOMATIC STOP-CCK FOR GS-BURNERS.

The Schedule referred to in these Letters Patent and making Part. of the same.

--Op-s* or improvements without further invention or expert.

nient.

My invention r'elates to a device for shutting the stop-cocksof gas-burners whenever the gas is accidentally exthlguished, and thus preventing a waste of gas and the resulting bad odor.

This invention consists of a hoop,suppo1ted at such a height as to encircle the blaze at a little distance above the burner. The hoop is coinposed of an outer rim of brass and an inner rim of steel, riveted together, and is fixed at one end. The other end moves from one side to the other, operating by the unequal expansion and contraction of the two metals, and thus moves .the arm of a Iever which connects Witha delicate .holdin g-catch or detent. By this the stop-cock is kept open as long as the gas burns and the heat is kept up, but whenever the flame is extingnished, the contracting hoop opcrates the lever, and through it on the detent, ii'eeing the arm of the 'stop-cock, and allowing it to close, which it does by a spring.

To more fully ,illustrate my invention reference is had to the accompanying drawings, forming a part of this specification, of which- I 'Eigure 1 is Va side elevation of a burner, With my device attached.

ligure 2 is a plan, showing the coinpound hoop.

Fignre 3 is an enlarged view of the detent.

Similar letters of reference in each of the figures indie-ate lil-:e parts.

A is a short section of gas-pipe, which Supplies the burner vl, and in which is placed a stop-cock, G,\vhich is kept closed by a spring, E.

This cock has an arm or lcver, D, projecting from it, and carrying at the end a small steel catch, a.

On the pipe, or at some convenient point, is placed a plate, F, upon which the catch or detent G- works, being opera-'ned by a light spring, H, so that, when the lever l) is turned to open the cock, the catch a is ret-aincd by the detent, thus keeping the cock open.

.ring b c, which, by greater eXJan An arm or standard, I, is clamped to the tube, or attached in some suitable manner, extending upward, and supporting a compound ring or hoop at such a height that it just encircles theaflame, and at a little distance from it. rThe Vring is fornied of an outcr band, I), of brass, and ap inner one, c, of steel, the two being firmlyfbolted together. 'Oneend'V of this'ring is fastened to the standard I, and the other is free.

To the free end a lever, K, is connected, and turns on a fulcrum at L. The lower end of this lever bent at right angles, and forms a detent, M, similarto G, and in the same plane With it.

Thev operation is as follows: The stop-cock O is opened, by turning the lever D until the triangular catch (o passes the detent G, by Which it is held. The gas is then lighted, and the 4fiame hwhecempound 1' of th e brass, forces the free end in, and thus moves tl`1e`l'eyr K outward. 'This motion'car'ries the detent M so' far that G is pushed away, and the catch a is then transfer-red to M, by Which it is held as. long as the gas burns; but if by acident the gas is extinguished, the ring b e contracts and throws the free end outwards again. This Withdraws the detent M by the action on the lever K, and the catch a, by its shape, passes between G and M and escapes, the spring E then closing the cock.

The present description applies to gas-burners, but my inventionis applicable to steam and water-pipes, with very little alteration.

Having thus described my invention,

What I claim, and desire to secure by Letters Patent, is

1. The compensating curb or rod, composed of two or more metals, b and c, together with the levcr K, detent M, arm D, and spring E, substantially as and for the purpose described.

2. The lever K, connected With the curb, the two detents G and M, and the catch a, on the arm D,constrncted and operated suhstantially as herein described.

In witness Whereof, I have hereunto set my hand and seal.

GEO. E. SMITH. [11. s.] Witnesses:

VV. H. GAMBLE, J. L. BooNn. 

